Tachometer problem at 307 1.4 lpg, vehicle stops

I want urgent help .. my car is the 2006 model 307 1.4 comfort model..the car stops when it is in the throttle .. the gear I was idle is already the tachometer moves spontaneously and then stops by itself ... .. if anyone has a problem like this, can you help me

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the brain of the vehicle is troubled, i recommend you to have it at the gas shop